Joint structure between wooden wall and building frame

Abstract

To provide a junction structure of a wooden wall and a skeleton capable of suppressing crack failure during shear deformation for higher bearing capacity.SOLUTION: A junction structure 100 of a wooden wall and a skeleton comprises a first junction part 3 provided at a lower part of an end in a width direction of a wooden wall 1, a second junction part 4 provided at a skeleton 2B and a pin junction part 5 which pin-joints the first junction part 3 and the second junction part 4. The wooden wall 1 has a core material and a face material provided on a surface on at least one side of the core material and the first junction part 3 is provided at a lower end of the core material.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a joining structure between a wooden wall and a building frame.

Background Art

[0002] Conventionally, there has been a case where CLT (Cross Laminated Timber) in which veneers are alternately laminated and bonded so that their fiber directions are orthogonal is joined to a building frame or the like and used as a seismic wall (see Patent Documents 1 and 2 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when a shear force acts on the joint portion between the wooden wall and the building frame, a tensile stress acts during shear deformation, and there is a risk of cleavage failure occurring in the joint portion.

[0005] Therefore, the present invention has been made in view of the above circumstances, and provides a joining structure between a wooden wall and a building frame that can suppress cleavage failure during shear deformation and increase high strength.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention employs the following means. That is, the joining structure between the wooden wall and the building frame according to the present invention includes a first joint portion provided at the lower part of the end portion in the width direction of the wooden wall, a second joint portion provided on the building frame, and a pin joint portion that pin-joins the first joint portion and the second joint portion.

[0007] In this type of joint structure between a wooden wall and a structural frame, a first joint located at the lower part of the widthwise end of the wooden wall and a second joint located on the structural frame are pin-connected. This pin-connects the wooden wall and the structural frame. By pin-connecting the widthwise end of the wooden wall, it functions as a tension joint, while, for example, the center of the widthwise section of the wooden wall can function as a shear joint. Therefore, at the widthwise end of the wooden wall where tensile stress acts during shear deformation, splitting failure due to additional bending can be suppressed, thereby increasing the load-bearing capacity.

[0008] Furthermore, in the joint structure between a wooden wall and a structural frame according to the present invention, the wooden wall comprises a core material and a surface material provided on at least one side of the core material, the first joint portion is provided at the lower end of the core material, and the lower end of the surface material may be located below the lower end of the core material.

[0009] In this type of joint structure between a wooden wall and the building frame, the lower end of the wooden wall's sheathing is located below the lower end of the core material. Therefore, the exposure of the first joint at the lower end of the core material is suppressed, improving the appearance.

[0010] Furthermore, in the joint structure between the wooden wall and the building frame according to the present invention, a slab may be installed on the building frame, and the lower end of the facing material may be in contact with the upper surface of the slab.

[0011] In this type of joint structure between a wooden wall and the building frame, the lower end of the facing material abuts against the upper surface of the slab installed on the building frame. Therefore, the exposure of the first joint, the second joint, and the pin joint is suppressed, improving the appearance. [Effects of the Invention]

[0012] The joint structure between the wooden wall and the building frame according to the present invention can suppress splitting failure during shear deformation, thereby increasing load-bearing capacity. [Brief explanation of the drawing]

[0013] [Figure 1] This is a front view showing a joint structure between a wooden wall and a building frame according to one embodiment of the present invention. [Figure 2] This diagram shows the joint structure between a wooden wall and a structural frame and the details of the slab according to one embodiment of the present invention, with (a) being a side view and (b) being a front view. [Figure 3] This shows the joint structure between the wooden wall and the building frame and the slab according to a modified example 1 of one embodiment of the present invention, with (a) being a side view and (b) being a front view. [Figure 4] This shows a modified example 2 of one embodiment of the present invention, illustrating the joint structure between the wooden wall and the building frame and the details of the slab, with (a) being a side view and (b) being a front view. [Modes for carrying out the invention]

[0014] A joint structure between a wooden wall and a building frame according to one embodiment of the present invention will be explained with reference to the drawings. Figure 1 is a front view showing a joint structure between a wooden wall and a building frame according to one embodiment of the present invention. As shown in Figure 1, an upper beam 2A and a lower beam 2B are installed on the upper and lower sides of the wooden wall 1, respectively. The joint structure 100 between the wooden wall and the structural frame (hereinafter simply referred to as "joint structure 100") according to this embodiment is a structure that joins the wooden wall 1 and the lower beam 2B. In this embodiment, the upper beam 2A and the lower beam 2B are sometimes collectively referred to as beam 2.

[0015] Beam 2 extends in a first direction along the horizontal (the direction of arrow X shown in Figure 1, etc.). The surface of the wooden wall 1 faces a second direction along the horizontal and perpendicular to the first direction (the direction of arrow Y shown in Figure 1, etc.). The wooden wall 1 has a long shape in the vertical direction (the direction of arrow Z shown in Figure 1, etc.). In each component, the side away from the center in the first and second directions is sometimes called the outside, and the side towards the center is sometimes called the inside. The first direction is sometimes called the width direction.

[0016] The wooden wall 1 is in the form of a board. The board surface of the wooden wall 1 is oriented in the Y direction. In this embodiment, the thickness of the wooden wall 1 is 240 mm.

[0017] FIG. 2 shows the fit between the joining structure 100 and the slab S, and is (a) a side view and (b) a front view. As shown in FIG. 2, the wooden wall 1 has a core material 16 and a surface material 17. The core material 16 is made of CLT. The core material 16 is plate-shaped. The surface materials 17 are provided on both surfaces of the core material 16. The lower surface 17d of the surface material 17 is located at the same height as the lower surface 16d of the core material 16.

[0018] As shown in FIG. 1, the beam 2 is an H-shaped steel. The upper beam 2A is arranged with a gap above the wooden wall 1. The lower beam 2B is arranged with a gap below the wooden wall 1.

[0019] The joining structure 100 is located below both ends in the width direction of the wooden wall 1. As shown in FIG. 2, the joining structure 100 includes a first joining metal (first joining portion) 3, a second joining metal (second joining portion) 4, and a pin joining portion 5.

[0020] The first joining metal 3 has an end face plate portion 31 and a joining plate portion 32. The end face plate portion 31 is arranged along the lower surface 16d of the core material 16 at both ends in the width direction of the wooden wall 1. A bolt 34 is inserted through a mounting hole formed in the end face plate portion 31 and screwed into the core material 16. A nut 35 is fastened to a portion of the bolt 34 that protrudes beyond the lower surface 16d of the core material 16. Thereby, the end face plate portion 31 is joined to the lower surface 16d of the core material 16. As the bolt 34, for example, a lag screw bolt, which is a rod-shaped threaded steel member, can be employed. The joining plate portion 32 extends downward from the end face plate portion 31.

[0021] The second joining metal 4 has a fixing plate portion 41. The fixing plate portion 41 is fixed to the upper flange 26 of the lower beam 2B by welding or the like. The fixing plate portion 41 is arranged below the joining plate portion 32. The plate surface of the fixing plate portion 41 faces the same direction as the plate surface of the joining plate portion 32.

[0022] The pin joint 5 connects the first connecting hardware 3, which is attached to the wooden wall 1, and the second connecting hardware 4, which is fixed to the lower beam 2B, using a pin joint. In other words, the wooden wall 1 is rotatably pin-connected to the lower beam 2B via the pin joint 5.

[0023] The pin joint 5 includes a splice plate 51, a fixing bolt 52, and a structural pin 55.

[0024] The splice plate 51 is positioned on both sides of the joining plate portion 32 and the fixing plate portion 41. The splice plate 51 is positioned across the joining plate portion 32 and the fixing plate portion 41. The surface of the splice plate 51 faces the same direction as the surface of the joining plate portion 32 and the surface of the fixing plate portion 41.

[0025] The fixing bolt 52 is inserted through the bolt hole formed in one splice plate 51, the bolt hole formed in the fixing plate portion 41, and the bolt hole formed in the other splice plate 51, and a nut 53 is fastened. In this way, the splice plate 51 is joined to the fixing plate portion 41. The joint between the splice plate 51 and the fixing plate portion 41 is a rigid joint that does not allow rotation.

[0026] The structural pin 55 is inserted through a bolt hole formed in one splice plate 51, a bolt hole formed in the joining plate portion 32, and a bolt hole formed in the other splice plate 51, and a nut 56 is fastened. In this way, the splice plate 51 is joined to the joining plate portion 32. The joining of the splice plate 51 and the joining plate portion 32 is a rotatable pin joint.

[0027] Slab S is installed on the lower beam 2B. Where the pin joint 5 is installed, slab S is cut out to correspond to the shape of the pin joint 5. The distance L1 between the upper surface Su of slab S and the lower surfaces 16d,17d of the wooden wall 1 is, for example, about 145 mm.

[0028] As shown in Figure 1, a connecting fitting 13 is fixed to the lower surface 16d of the core material 16 in the center of the width direction of the wooden wall 1. A connecting fitting 23 is fixed to the upper part of the lower beam 2B. The connecting fitting 13 and the connecting fitting 23 are joined by bolts 18 via a splice plate or the like.

[0029] At the upper ends of both ends in the width direction of the wooden wall 1, connecting hardware 11 is fixed with bolts 12. As bolts 12, for example, lag screw bolts, which are rod-shaped threaded steel members, can be used. At the center of the width direction of the wooden wall 1, connecting hardware 13 is fixed.

[0030] A connecting fitting 21 is fixed to the lower part of the upper beam 2A at the location corresponding to the connecting fitting 11. A connecting fitting 23 is fixed to the lower part of the upper beam 2A at the location corresponding to the connecting fitting 13. Connecting fittings 11 and 21 are bolted together via a splice plate or the like. Connecting fittings 13 and 23 are bolted together via a splice plate or the like.

[0031] In the joint structure 100 configured in this way, the first connecting hardware 3 provided at the lower part of the wooden wall 1 and the second connecting hardware 4 provided on the lower beam 2B are pin-connected at the pin joint 5. This pin-connects the wooden wall 1 and the lower beam 2B. By pin-connecting the ends of the wooden wall 1 in the width direction, it functions as a tension joint. By rigidly connecting the center of the wooden wall 1 in the width direction with bolts 18, it functions as a shear joint. Therefore, at the ends of the wooden wall 1 in the width direction where tensile stress acts during shear deformation, splitting failure due to additional bending can be suppressed, thereby increasing the load-bearing capacity.

[0032] (Variation 1) Next, Modification 1 will be described, mainly using Figure 3. In the following description of the modification, the same reference numerals will be used for members and parts that are the same as or similar to those in the above-described embodiment, and their descriptions will be omitted. A description of a configuration that differs from the embodiment will be provided.

[0033] Figure 3 shows the joint structure between the wooden wall and the building frame and the details of the slab according to a modified example 1 of one embodiment of the present invention, and is (a) a side view and (b) a front view. As shown in Figure 3, in the modified joint structure 100A, the lower surface 17d of the facing material 17 of the wooden wall 1 is located below the lower surface 16d of the core material 16. As shown in Figure 3(b), In a front view, the lower end portion 17a of the face material 17 is positioned to overlap with the end face plate portion 31 of the first connecting hardware 3, the nut 35, and the upper bolt 18a of the bolts 18, thereby suppressing the exposure of the nut 35 and the upper bolt 18a.

[0034] In a front view, the lower end 17a of the facing material 17 does not overlap with the structural pin 55 and the lower bolt 18b of the bolt 18. The distance L2 between the upper surface Su of the slab S and the lower surface 17d of the facing material 17 of the wooden wall 1 is, for example, about 55 mm.

[0035] In the joint structure 100A configured in this way, the first connecting hardware 3 provided at the lower part of the wooden wall 1 and the second connecting hardware 4 provided on the lower beam 2B are pin-connected at the pin joint 5. This pin-connects the wooden wall 1 and the lower beam 2B. By pin-connecting the ends of the wooden wall 1 in the width direction, it functions as a tension joint. By rigidly connecting the center of the wooden wall 1 in the width direction with bolts 18, it functions as a shear joint. Therefore, at the ends of the wooden wall 1 in the width direction where tensile stress acts during shear deformation, splitting failure due to additional bending can be suppressed, thereby increasing the load-bearing capacity.

[0036] Furthermore, the lower surface 17d of the facing material 17 of the wooden wall 1 is located lower than the lower surface 16d of the core material 16. In a front view, the lower end portion 17a of the facing material 17 is positioned to overlap with the end plate portion 31, nut 35, and upper bolt 18a of the first connecting hardware 3. Therefore, the exposure of the end plate portion 31, nut 35, and upper bolt 18a of the first connecting hardware 3 is suppressed, and the appearance can be improved.

[0037] (Modification 2) Next, we will explain the second modified example, mainly using Figure 4. Figure 4 shows the joint structure between the wooden wall and the building frame and the details of the slab according to a modified example 2 of one embodiment of the present invention, and is (a) a side view and (b) a front view. As shown in Figure 4, in the modified joint structure 100B, the lower surface 17d of the facing material 17 of the wooden wall 1 is located below the lower surface 16d of the core material 16 and is in contact with the upper surface Su of the slab S.

[0038] As shown in Figure 4(b), in a front view, a through hole 17b is formed in the lower end portion 17a of the facing material 17 at a position corresponding to the lower bolt 18b. The diameter of the through hole 17b is slightly larger than the diameter of the bolt 18b.

[0039] In the joint structure 100A configured in this way, the first connecting hardware 3 provided at the lower part of the wooden wall 1 and the second connecting hardware 4 provided on the lower beam 2B are pin-connected at the pin joint 5. This pin-connects the wooden wall 1 and the lower beam 2B. By pin-connecting the ends of the wooden wall 1 in the width direction, it functions as a tension joint. By rigidly connecting the center of the wooden wall 1 in the width direction with bolts 18, it functions as a shear joint. Therefore, at the ends of the wooden wall 1 in the width direction where tensile stress acts during shear deformation, splitting failure due to additional bending can be suppressed, thereby increasing the load-bearing capacity.

[0040] Furthermore, in a front view, a through hole 17b is formed in the lower end portion 17a of the facing material 17 at a position corresponding to the lower bolt 18b. Therefore, the bolt 18b can be fastened through the through hole 17b, resulting in good workability.

[0041] Furthermore, the lower surface 17d of the facing material 17 is in contact with the upper surface Su of the slab S installed on the lower beam 2B. Therefore, the exposure of the first connecting hardware 3, the second connecting hardware 4, and the pin joint 5 is suppressed, and the appearance can be improved.

[0042] It should be noted that the assembly procedure, or the various shapes and combinations of each component shown in the above-described embodiment, are merely examples and can be modified in various ways based on design requirements, etc., without departing from the spirit of the present invention.

[0043] For example, in the embodiment described above, the lower beam 2B is used as an example of the structural frame to which the wooden wall 1 is joined by the joint structure 100, but it is not limited to this. The structural frame may be of a different form or made of reinforced concrete.

[0044] In the embodiment shown above, the first connecting fitting 3 and the second connecting fitting 4 are pin-joined via a splice plate 51 using structural pins 55, but the embodiment is not limited to this. The first connecting fitting 3 and the second connecting fitting 4 may also be directly pin-joined using structural pins 55.

[0045] The Sustainable Development Goals (SDGs) are 17 international goals adopted at the UN Summit in September 2015. The joint structure 100 according to this embodiment can contribute to achieving some of the 17 SDGs, such as goal 15, "Protect, restore and promote sustainable use of terrestrial ecosystems." [Explanation of symbols]

[0046] 1 Wooden wall 2B Lower beam (framework) 3. First connecting hardware (first joint) 4. Second connecting hardware (second joint) 5. Pin connection 16 Core material 17. Surface material 100, 100A, 100B Joint Structure (Joining structure between wooden wall and building frame) S Slab Su top surface

Claims

1. A first joint is provided at the lower part of the end in the width direction of the wooden wall, The second joint provided in the structure, The device comprises a pin joint that pin-connects the first joint and the second joint, The aforementioned wooden wall is rigidly joined at its center in the width direction. The first joint is a joint structure between a wooden wall and the building frame, which is joined to the wooden wall by lag screw bolts.

2. A first joint is provided at the lower part of the end in the width direction of the wooden wall, The second joint provided in the structure, The device comprises a pin joint that pin-connects the first joint and the second joint, The aforementioned wooden wall is rigidly joined at its center in the width direction. The aforementioned wooden wall is Core material and The core material has a surface material provided on at least one side of it, The first joint is provided at the lower end of the core material, The lower end of the aforementioned facing material is a joint structure between the wooden wall and the building frame, located below the lower end of the aforementioned core material.

3. A slab is installed on the aforementioned structure. The joint structure between a wooden wall and a structural frame according to claim 2, wherein the lower end of the aforementioned facing material is in contact with the upper surface of the slab.

4. A first joint is provided at the lower part of the end in the width direction of the wooden wall, The second joint provided in the structure, The device comprises a pin joint that pin-connects the first joint and the second joint, The aforementioned wooden wall is Core material and The core material has a surface material provided on at least one side of it, The first joint is provided at the lower end of the core material, The lower end of the surface material is located below the lower end of the core material. A slab is installed on the aforementioned structure. The lower end of the aforementioned facing material is a joint structure between the wooden wall and the structural frame, which is in contact with the upper surface of the slab.

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